feat: accessibility improvements

[jon-cullison]

Implements 2/3 of the proposed changes here:
ant-design/ant-design#53203

I did not implement the panel role change because there is already some logic around setting the panel role to "tabpanel" when in accordion mode, and the panel role = "region" is optional for a11y purposes.

• Adds optional headingLevel prop which will wrap the collapse header in a header element
• Adds a default id generated by uuid to the collapse which will be used to create ids for the child components in order to link the header and panel.
• Adds optional id prop which will override the default id mentioned above

Summary by CodeRabbit

• Style

  • 优化折叠组件头部样式，确保标准与禁用状态下显示统一。

• 新功能

  • 引入自动生成唯一标识符功能，支持自定义 ID，提升组件稳定性与无障碍体验。
  • 增加了设置标题层级的选项，使显示层次更灵活友好。
  • 折叠面板头部增加 ARIA 角色与属性，增强无障碍支持。

• Tests

  • 扩展了测试覆盖，验证 ID 与标题层级功能的正确性，从而提升了整体可靠性。